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Code Issues Releases Wiki Activity

Updated info regarding ALB Host header support (#468)

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Tomasz Cholewa 2017-08-01 01:04:17 +02:00 • committed by Thanos Baskous
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@ -1054,7 +1054,7 @@ ALB
- 🔸ALBs only support HTTP/2 over HTTPS (no plain-text HTTP/2).
- 🔸ALBs only support HTTP/2 to external clients and not to internal resources (instances/containers).
- ALBs support HTTP routing but not port-based TCP routing.
- ALBs do not (yet) support routing based on HTTP “Host” header or HTTP verb.
- ALBs support routing based on HTTP “Host” header or HTTP verb
- Instances in the ALB’s target groups have to either have a single, fixed healthcheck port (“EC2 instance”-level healthcheck) or the healthcheck port for a target has to be the same as its application port (“Application instance”-level healthcheck) - you can't configure a per-target healthcheck port that is different than the application port.
- ALBs are VPC-only (they are not available in EC2 Classic)
- In a target group, if there is no healthy target, all requests are routed to all targets. For example, if you point a listener at a target group containing a single service that has a long initialization phase (during which the health checks would fail), requests will reach the service while it is still starting up.